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Makina Mühendisliği: Recent submissions

Now showing items 221-240 of 366

A system of cracks in an elastic half-plane

Alnıak, M. Oktay. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)

The plane elastostatic problem of an isotropic elastic half-plane containing an arbitrary system of cracks is considered. Fourier transform technique is employed to obtain the edge dislocation solutions. Using the edge ...
Design, production and testing of a laboratory scale organic rankine cycle system

Kardaş, Onur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)

This study presents the thermodynamic design, implementation and commissioning of a small scale organic Rankine cycle test rig. The objective was to design a exible organic Rankine cycle test rig to study performance of ...
Experimental investigation of the effects of cathode position on HK40 hall effect thruster performance and cathode coupling

Turan, Nazlı. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Electric propulsion systems are being developed for orbital and deep space maneuvers of spacecraft. Hall e ect thrusters, studied under electric propulsion systems, are among the most preferred thrusters for future space ...
Deformation heterogeneity in textured magnesium AZ31 under reversed loading

Kapan, Enver. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

The evolution of heterogeneous deformation fields in rolled Mg AZ31 under compres- sion -tension-compression loading along the rolling direction is investigated with multiscale digital image correlation. Full-field deformation ...
Experimental and numerical investigation of the crushing process of composite crash box

Engül, Mehmet Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Due to restrictions to bring down fuel consumption and carbon emissions, the recent research and technology innovations are encouraging automakers to apply new materials in automotive industry for light weight designs. ...
Analysis of internal combustion engine cylinder block and head cooling using nanofluid coolant

Urgancı, Kemal Burak. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

This study investigates the application of nano uids in an engine cooling system considering the complete system performance. Performance of nano uid coolants is examined in comparison with traditional coolants for a ...
Numerical simulation of germanium single crystals grown with a low melt height and an axial vibration

Louyeh, Pouya Yousefi. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this study, antimony-doped germanium (Ge-Sb) crystal growth from the melt using three directional growth methods, the vertical Bridgman (VB), the axial heat processing (AHP), and the axial vibrational control (AVC), is ...
Contribution of artificial proprioception on coordinated manipulation

Hojatmadani, Mehdi. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Lacking an e cient sensory feedback system has caused upper-limb robotic prostheses to lose their popularity among users as they cannot re ect realistic feeling of performing a task. One of the obstacles in achieving this ...
Experimental characterization of thermophysical properties and convective heat transfer behavior of hexagonal boron nitride nanofluids

İlhan, Beybin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Hexagonal boron nitride (hBN) is a highly stable dielectric ceramic material that exhibits versatile properties such as, exceptionally high thermal conductivity and good chemical inertness. In this study, preparation, ...
Eeffect of loading rate on fracture of NiTi

Mutlu, Fatma. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

This thesis studies the e ect of loading rate on fracture behavior of Shape Memory Alloy (SMA) NiTi. First, Di erential Scanning Calorimetry (DSC) are used to obtain the phase transformation temperatures of NiTi. Then ...
Shape optimization of notched parts for maximum fatigue life

Erkol, Volkan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

The objective of the thesis study is to develop a shape optimization procedure to maximize fatigue life of notched components under in-phase or out-of-phase multiaxial loading conditions. Two critical-plane fatigue assessment ...
Design and evaluation of a continuum robot with extendable balloons

Yarbaşı, Efe Yamaç. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this thesis, a novel continuum robot actuated with extendable balloons is presented. The robot is composed of two parts; the tip and the exible shaft. The balloons are attached to the tip from their slack sections. The ...
A solution for fully developed turbulent heat transfer in a circular tube with uniform wall temperature, using a continuous velocity profile

Merttürk, İbrahim. (Thesis (M.S.) - Robert College. Faculty of Graduate School of Engineering, 1970., 1970.)

Heat transfer coefficients and temperature profiles for fully developed turbulent pipe flow with uniform wall temperature are predicted for P 1. The continous and differentiable velocity profile of Pai (1)1 is used to ...
2-D modeling of compression ignition engine combustion

Yıldırım, Cebrail. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Internal combustion engines are the cornerstones of our society. They are widely used in a vast range of area from transportation to power generation. Since they are mostly petroleum-powered and emission regulations are ...
Enhancing local absorption patterns within gold nano - structures on a dielectric surface under an afm probe and with evanescent - wave illumination

Moghaddam, Sina Talebi. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

This study considers enhancing localized absorption by a gold nanoparticle (NP) placed over a substrate where an atomic force microscope (AFM) tip is in close proximity of the particle. The gold NP and AFM tip are interacting ...
Eddy current damping applications for vibration isolation purposes

Özkaya, Efe. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this thesis, passive eddy current damping (ECD) is used in two di erent novel designs that show vibration stop bands. One includes an inertial ampli cation mechanism and the other includes local resonators. In both ...
Fabrication and characterization of B4C and BN refinforced aluminium matrix composites by squeeze casting

Nekouyan, Amin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Aluminium matrix composites (AMC) with different ceramic particle reinforcements gained significant attention due to high demand for materials with versatile properties in the industry. In the present work boron carbide ...
Microstructure analysis of an as - serviced first stage land based gas turbine blade

Akkoyun, Mehmet Güçl. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Superalloys are high temperature materials, and they are used in many industries. Gas turbine industry, aircrafts, and space vehicles are the important industries in which superalloys are used. They are preferred because ...
Single crystal growth of Ni-base superalloys by the conventional vertical bridgman and novel submerged baffle methods

Bacak, Mert. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

The purpose of this study is to develop a know-how on the growth of single crystal superalloys and investigate the e ect of solidi cation rate and solidi cation technique on microstructural features of CMSX-4. Primary ...
Reduction of large kinetic mechanism of N-heptane using directed relation graph and computational singular pertubation methods

Ulutürk, Oğuz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

Increasing demand on energy makes scientists and engineers enthusiastic to nd new and e cient ways while designing new engines. For this purpose, a tremendous e ort is paid on fossil fuels which have an important role in ...

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